Improvement in chocks for holding ropes



D. 1 BROWN. CABLE STOPPER.

Patented 001;. 11, 1870.

"UNITE-D- SiATEs PATENT ()rrrcn.

Dominick D. BROWN, or oswneo, NEW YORK.

IMPROVEMENT N CHOCKS FOR HOLDING ROPES.

Specification forming part of Letters Patent No. 108,101, dated October 11, 1870.

T0 all whom it may concernf Be it known that I DOMINIOK D. BROWN, of thecity of Oswego, in the county of Oswego and State of New York, have invented a new and Improved Description of Chock for Holding Fast Ropes or Cordage, of which the following is a specification.

Figure 1 of the drawings is a representation of a side view. of the eccentric used in my chock. Fig. 2 is a plan view of my invention.

Fig. 3 is a longitudinal section, and Fig. 4 is a detail.

Myjnvention has relation to means for clutching and holding the ends of ropes used in conneetionwit-h the rigging of vessels and other like purposes; and it consistsin the novel the plates A and B. It is held in place and rotates around the pin K, which passes through its center, and has it's ends firmly secured in the plates A and B, respectively. It has also a friction-roller, p, as shown. One side ofthis eccentric is usually corrugated, as shown at a, to aid in holding the rope in place.

The letter 1) represents apitman arranged to work back and forth in the recess c. It has a hook, 0, on its front end, adapted to engage with pin 7' on the cam c, as shown, for the purpose hereinafter mentioned. The rear end of this pitman D is turned upward, and, passing through the slot 7:. of the bed-plate, forms a step or handle for the movement thereof. This handle is marked 12 in the drawings.

. The letter it represents a rod arranged horizontally in the slot h, and) passes through the handle 1), furnishing a guide for the movement thereof back and forth at will.

The letter it represents a coiled spring arranged around this rod, and serves to aid in the movement of the handle 1; and. the machinery therewith connpcted.

H represents a sliding clock or clutch con- "structed with a series of notches on its upper surface, (marked 'v,) and with a longitudinal slot, Y, adapted to receive and work upon the upright standard z, as shown. The front end of this block is constructed with a curved groove, as shown, upon nearly the same circle as the corrugated part of the cam, and oper ates in conjunction therewith to hold the rope in place.

The letter on represents a dog, )ivoted as shown, and'arranged to work in the notches 'v of the clutch H. which is designed for use in opening and closing the opening or throats,

to adapt said throat to the size of the rope to.

be used.

The standard-z has its lower end firmly at tached to the upper surface of the bed-plate, and, after passing upward through the slot in the sliding block, is perforatedat right angles therewith to receive the pivot-pin of the dog next mentioned.

The letter at represents a dog or pawl in the top of the standard 2, adapted to work in the teeth '0 of theslidi'ng block. The pivot-pin of the dog is extended outward, and bentinsuch manner as to form a crank, as shown.

My device is operated as follows, namely: The end of the rope to be clutched is passed from the right to the left through the throat or opening between the eccentric and the grooved end of the sliding block after said block has been adjusted by its pawl, so as to form a throatadapted to the size of the rope;

The corrugated cam c, in conjunction with the block H, will then hold the rope securely. W hen the operator desires to release the rope, he forces the step 1; forward. This movement causes the hook o to engage with the pin 1-, and thereby throw the corrugated part of the cam forward, enlarging the throat and releasing the rope.

I claim as my invention- 1. The combination and arrangement of th corrugated cam G, sliding block H. and dog m, when constructed and operating as and for the purpose specified. v

2. In combination with the cam C and sliding block, H, the pitman D and the spring a, when constructed and operating as and for the purpose specified.

l). D. BROW'N.

Witnesses:

THOMAS F. BROWN, Latins-THORNTON. 

